Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /** |
b5e89ed5 | 2 | * \file drm_bufs.c |
1da177e4 | 3 | * Generic buffer template |
b5e89ed5 | 4 | * |
1da177e4 LT |
5 | * \author Rickard E. (Rik) Faith <faith@valinux.com> |
6 | * \author Gareth Hughes <gareth@valinux.com> | |
7 | */ | |
8 | ||
9 | /* | |
10 | * Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com | |
11 | * | |
12 | * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas. | |
13 | * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. | |
14 | * All Rights Reserved. | |
15 | * | |
16 | * Permission is hereby granted, free of charge, to any person obtaining a | |
17 | * copy of this software and associated documentation files (the "Software"), | |
18 | * to deal in the Software without restriction, including without limitation | |
19 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
20 | * and/or sell copies of the Software, and to permit persons to whom the | |
21 | * Software is furnished to do so, subject to the following conditions: | |
22 | * | |
23 | * The above copyright notice and this permission notice (including the next | |
24 | * paragraph) shall be included in all copies or substantial portions of the | |
25 | * Software. | |
26 | * | |
27 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
28 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
29 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
30 | * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
31 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
32 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
33 | * OTHER DEALINGS IN THE SOFTWARE. | |
34 | */ | |
35 | ||
36 | #include <linux/vmalloc.h> | |
5a0e3ad6 | 37 | #include <linux/slab.h> |
f1a2a9b6 | 38 | #include <linux/log2.h> |
2d1a8a48 | 39 | #include <linux/export.h> |
f1a2a9b6 | 40 | #include <asm/shmparam.h> |
1da177e4 LT |
41 | #include "drmP.h" |
42 | ||
55910517 | 43 | static struct drm_map_list *drm_find_matching_map(struct drm_device *dev, |
f77d390c | 44 | struct drm_local_map *map) |
836cf046 | 45 | { |
55910517 | 46 | struct drm_map_list *entry; |
bd1b331f | 47 | list_for_each_entry(entry, &dev->maplist, head) { |
41c2e75e BH |
48 | /* |
49 | * Because the kernel-userspace ABI is fixed at a 32-bit offset | |
66aa6962 TV |
50 | * while PCI resources may live above that, we only compare the |
51 | * lower 32 bits of the map offset for maps of type | |
52 | * _DRM_FRAMEBUFFER or _DRM_REGISTERS. | |
53 | * It is assumed that if a driver have more than one resource | |
54 | * of each type, the lower 32 bits are different. | |
41c2e75e BH |
55 | */ |
56 | if (!entry->map || | |
57 | map->type != entry->map->type || | |
58 | entry->master != dev->primary->master) | |
59 | continue; | |
60 | switch (map->type) { | |
61 | case _DRM_SHM: | |
62 | if (map->flags != _DRM_CONTAINS_LOCK) | |
63 | break; | |
66aa6962 | 64 | return entry; |
41c2e75e BH |
65 | case _DRM_REGISTERS: |
66 | case _DRM_FRAME_BUFFER: | |
66aa6962 TV |
67 | if ((entry->map->offset & 0xffffffff) == |
68 | (map->offset & 0xffffffff)) | |
69 | return entry; | |
41c2e75e BH |
70 | default: /* Make gcc happy */ |
71 | ; | |
836cf046 | 72 | } |
41c2e75e BH |
73 | if (entry->map->offset == map->offset) |
74 | return entry; | |
836cf046 DA |
75 | } |
76 | ||
77 | return NULL; | |
1da177e4 | 78 | } |
1da177e4 | 79 | |
e0be428e | 80 | static int drm_map_handle(struct drm_device *dev, struct drm_hash_item *hash, |
f1a2a9b6 | 81 | unsigned long user_token, int hashed_handle, int shm) |
d1f2b55a | 82 | { |
f1a2a9b6 DM |
83 | int use_hashed_handle, shift; |
84 | unsigned long add; | |
85 | ||
c2604ce0 | 86 | #if (BITS_PER_LONG == 64) |
8d153f71 TH |
87 | use_hashed_handle = ((user_token & 0xFFFFFFFF00000000UL) || hashed_handle); |
88 | #elif (BITS_PER_LONG == 32) | |
89 | use_hashed_handle = hashed_handle; | |
90 | #else | |
91 | #error Unsupported long size. Neither 64 nor 32 bits. | |
92 | #endif | |
d1f2b55a | 93 | |
e08870c8 TH |
94 | if (!use_hashed_handle) { |
95 | int ret; | |
1545085a | 96 | hash->key = user_token >> PAGE_SHIFT; |
e08870c8 TH |
97 | ret = drm_ht_insert_item(&dev->map_hash, hash); |
98 | if (ret != -EINVAL) | |
99 | return ret; | |
d1f2b55a | 100 | } |
f1a2a9b6 DM |
101 | |
102 | shift = 0; | |
103 | add = DRM_MAP_HASH_OFFSET >> PAGE_SHIFT; | |
104 | if (shm && (SHMLBA > PAGE_SIZE)) { | |
105 | int bits = ilog2(SHMLBA >> PAGE_SHIFT) + 1; | |
106 | ||
107 | /* For shared memory, we have to preserve the SHMLBA | |
108 | * bits of the eventual vma->vm_pgoff value during | |
109 | * mmap(). Otherwise we run into cache aliasing problems | |
110 | * on some platforms. On these platforms, the pgoff of | |
111 | * a mmap() request is used to pick a suitable virtual | |
112 | * address for the mmap() region such that it will not | |
113 | * cause cache aliasing problems. | |
114 | * | |
115 | * Therefore, make sure the SHMLBA relevant bits of the | |
116 | * hash value we use are equal to those in the original | |
117 | * kernel virtual address. | |
118 | */ | |
119 | shift = bits; | |
120 | add |= ((user_token >> PAGE_SHIFT) & ((1UL << bits) - 1UL)); | |
121 | } | |
122 | ||
e08870c8 TH |
123 | return drm_ht_just_insert_please(&dev->map_hash, hash, |
124 | user_token, 32 - PAGE_SHIFT - 3, | |
f1a2a9b6 | 125 | shift, add); |
d1f2b55a | 126 | } |
9a186645 | 127 | |
1da177e4 | 128 | /** |
f77d390c BH |
129 | * Core function to create a range of memory available for mapping by a |
130 | * non-root process. | |
1da177e4 LT |
131 | * |
132 | * Adjusts the memory offset to its absolute value according to the mapping | |
133 | * type. Adds the map to the map list drm_device::maplist. Adds MTRR's where | |
134 | * applicable and if supported by the kernel. | |
135 | */ | |
41c2e75e | 136 | static int drm_addmap_core(struct drm_device * dev, resource_size_t offset, |
c60ce623 | 137 | unsigned int size, enum drm_map_type type, |
55910517 DA |
138 | enum drm_map_flags flags, |
139 | struct drm_map_list ** maplist) | |
1da177e4 | 140 | { |
f77d390c | 141 | struct drm_local_map *map; |
55910517 | 142 | struct drm_map_list *list; |
9c8da5eb | 143 | drm_dma_handle_t *dmah; |
8d153f71 TH |
144 | unsigned long user_token; |
145 | int ret; | |
1da177e4 | 146 | |
9a298b2a | 147 | map = kmalloc(sizeof(*map), GFP_KERNEL); |
b5e89ed5 | 148 | if (!map) |
1da177e4 LT |
149 | return -ENOMEM; |
150 | ||
7ab98401 DA |
151 | map->offset = offset; |
152 | map->size = size; | |
153 | map->flags = flags; | |
154 | map->type = type; | |
1da177e4 LT |
155 | |
156 | /* Only allow shared memory to be removable since we only keep enough | |
157 | * book keeping information about shared memory to allow for removal | |
158 | * when processes fork. | |
159 | */ | |
b5e89ed5 | 160 | if ((map->flags & _DRM_REMOVABLE) && map->type != _DRM_SHM) { |
9a298b2a | 161 | kfree(map); |
1da177e4 LT |
162 | return -EINVAL; |
163 | } | |
41c2e75e BH |
164 | DRM_DEBUG("offset = 0x%08llx, size = 0x%08lx, type = %d\n", |
165 | (unsigned long long)map->offset, map->size, map->type); | |
b6741377 BH |
166 | |
167 | /* page-align _DRM_SHM maps. They are allocated here so there is no security | |
168 | * hole created by that and it works around various broken drivers that use | |
169 | * a non-aligned quantity to map the SAREA. --BenH | |
170 | */ | |
171 | if (map->type == _DRM_SHM) | |
172 | map->size = PAGE_ALIGN(map->size); | |
173 | ||
41c2e75e | 174 | if ((map->offset & (~(resource_size_t)PAGE_MASK)) || (map->size & (~PAGE_MASK))) { |
9a298b2a | 175 | kfree(map); |
1da177e4 LT |
176 | return -EINVAL; |
177 | } | |
b5e89ed5 | 178 | map->mtrr = -1; |
1da177e4 LT |
179 | map->handle = NULL; |
180 | ||
b5e89ed5 | 181 | switch (map->type) { |
1da177e4 LT |
182 | case _DRM_REGISTERS: |
183 | case _DRM_FRAME_BUFFER: | |
4b7fb9b5 | 184 | #if !defined(__sparc__) && !defined(__alpha__) && !defined(__ia64__) && !defined(__powerpc64__) && !defined(__x86_64__) && !defined(__arm__) |
8d2ea625 | 185 | if (map->offset + (map->size-1) < map->offset || |
b5e89ed5 | 186 | map->offset < virt_to_phys(high_memory)) { |
9a298b2a | 187 | kfree(map); |
1da177e4 LT |
188 | return -EINVAL; |
189 | } | |
1da177e4 | 190 | #endif |
836cf046 DA |
191 | /* Some drivers preinitialize some maps, without the X Server |
192 | * needing to be aware of it. Therefore, we just return success | |
193 | * when the server tries to create a duplicate map. | |
194 | */ | |
89625eb1 DA |
195 | list = drm_find_matching_map(dev, map); |
196 | if (list != NULL) { | |
197 | if (list->map->size != map->size) { | |
836cf046 | 198 | DRM_DEBUG("Matching maps of type %d with " |
b5e89ed5 DA |
199 | "mismatched sizes, (%ld vs %ld)\n", |
200 | map->type, map->size, | |
201 | list->map->size); | |
89625eb1 | 202 | list->map->size = map->size; |
836cf046 DA |
203 | } |
204 | ||
9a298b2a | 205 | kfree(map); |
89625eb1 | 206 | *maplist = list; |
836cf046 DA |
207 | return 0; |
208 | } | |
209 | ||
1da177e4 | 210 | if (drm_core_has_MTRR(dev)) { |
b5e89ed5 DA |
211 | if (map->type == _DRM_FRAME_BUFFER || |
212 | (map->flags & _DRM_WRITE_COMBINING)) { | |
213 | map->mtrr = mtrr_add(map->offset, map->size, | |
214 | MTRR_TYPE_WRCOMB, 1); | |
1da177e4 LT |
215 | } |
216 | } | |
0769d39c | 217 | if (map->type == _DRM_REGISTERS) { |
004a7727 | 218 | map->handle = ioremap(map->offset, map->size); |
0769d39c | 219 | if (!map->handle) { |
9a298b2a | 220 | kfree(map); |
0769d39c ST |
221 | return -ENOMEM; |
222 | } | |
223 | } | |
bc5f4523 | 224 | |
1da177e4 | 225 | break; |
1da177e4 | 226 | case _DRM_SHM: |
54ba2f76 DA |
227 | list = drm_find_matching_map(dev, map); |
228 | if (list != NULL) { | |
229 | if(list->map->size != map->size) { | |
230 | DRM_DEBUG("Matching maps of type %d with " | |
231 | "mismatched sizes, (%ld vs %ld)\n", | |
232 | map->type, map->size, list->map->size); | |
233 | list->map->size = map->size; | |
234 | } | |
235 | ||
9a298b2a | 236 | kfree(map); |
54ba2f76 DA |
237 | *maplist = list; |
238 | return 0; | |
239 | } | |
f239b7b0 | 240 | map->handle = vmalloc_user(map->size); |
b5e89ed5 DA |
241 | DRM_DEBUG("%lu %d %p\n", |
242 | map->size, drm_order(map->size), map->handle); | |
243 | if (!map->handle) { | |
9a298b2a | 244 | kfree(map); |
1da177e4 LT |
245 | return -ENOMEM; |
246 | } | |
247 | map->offset = (unsigned long)map->handle; | |
b5e89ed5 | 248 | if (map->flags & _DRM_CONTAINS_LOCK) { |
1da177e4 | 249 | /* Prevent a 2nd X Server from creating a 2nd lock */ |
7c1c2871 | 250 | if (dev->primary->master->lock.hw_lock != NULL) { |
b5e89ed5 | 251 | vfree(map->handle); |
9a298b2a | 252 | kfree(map); |
1da177e4 LT |
253 | return -EBUSY; |
254 | } | |
7c1c2871 | 255 | dev->sigdata.lock = dev->primary->master->lock.hw_lock = map->handle; /* Pointer to lock */ |
1da177e4 LT |
256 | } |
257 | break; | |
54ba2f76 | 258 | case _DRM_AGP: { |
55910517 | 259 | struct drm_agp_mem *entry; |
54ba2f76 DA |
260 | int valid = 0; |
261 | ||
262 | if (!drm_core_has_AGP(dev)) { | |
9a298b2a | 263 | kfree(map); |
54ba2f76 DA |
264 | return -EINVAL; |
265 | } | |
1da177e4 | 266 | #ifdef __alpha__ |
54ba2f76 | 267 | map->offset += dev->hose->mem_space->start; |
1da177e4 | 268 | #endif |
47a184a8 EA |
269 | /* In some cases (i810 driver), user space may have already |
270 | * added the AGP base itself, because dev->agp->base previously | |
271 | * only got set during AGP enable. So, only add the base | |
272 | * address if the map's offset isn't already within the | |
273 | * aperture. | |
54ba2f76 | 274 | */ |
47a184a8 EA |
275 | if (map->offset < dev->agp->base || |
276 | map->offset > dev->agp->base + | |
277 | dev->agp->agp_info.aper_size * 1024 * 1024 - 1) { | |
278 | map->offset += dev->agp->base; | |
279 | } | |
54ba2f76 DA |
280 | map->mtrr = dev->agp->agp_mtrr; /* for getmap */ |
281 | ||
282 | /* This assumes the DRM is in total control of AGP space. | |
283 | * It's not always the case as AGP can be in the control | |
284 | * of user space (i.e. i810 driver). So this loop will get | |
285 | * skipped and we double check that dev->agp->memory is | |
286 | * actually set as well as being invalid before EPERM'ing | |
287 | */ | |
bd1b331f | 288 | list_for_each_entry(entry, &dev->agp->memory, head) { |
54ba2f76 DA |
289 | if ((map->offset >= entry->bound) && |
290 | (map->offset + map->size <= entry->bound + entry->pages * PAGE_SIZE)) { | |
291 | valid = 1; | |
292 | break; | |
293 | } | |
1da177e4 | 294 | } |
bd1b331f | 295 | if (!list_empty(&dev->agp->memory) && !valid) { |
9a298b2a | 296 | kfree(map); |
54ba2f76 DA |
297 | return -EPERM; |
298 | } | |
41c2e75e BH |
299 | DRM_DEBUG("AGP offset = 0x%08llx, size = 0x%08lx\n", |
300 | (unsigned long long)map->offset, map->size); | |
54ba2f76 | 301 | |
a2c0a97b | 302 | break; |
812c369d | 303 | } |
a2c0a97b | 304 | case _DRM_GEM: |
812c369d | 305 | DRM_ERROR("tried to addmap GEM object\n"); |
1da177e4 LT |
306 | break; |
307 | case _DRM_SCATTER_GATHER: | |
308 | if (!dev->sg) { | |
9a298b2a | 309 | kfree(map); |
1da177e4 LT |
310 | return -EINVAL; |
311 | } | |
d1f2b55a | 312 | map->offset += (unsigned long)dev->sg->virtual; |
1da177e4 | 313 | break; |
b5e89ed5 | 314 | case _DRM_CONSISTENT: |
2d0f9eaf | 315 | /* dma_addr_t is 64bit on i386 with CONFIG_HIGHMEM64G, |
9c8da5eb | 316 | * As we're limiting the address to 2^32-1 (or less), |
2d0f9eaf DA |
317 | * casting it down to 32 bits is no problem, but we |
318 | * need to point to a 64bit variable first. */ | |
e6be8d9d | 319 | dmah = drm_pci_alloc(dev, map->size, map->size); |
9c8da5eb | 320 | if (!dmah) { |
9a298b2a | 321 | kfree(map); |
2d0f9eaf DA |
322 | return -ENOMEM; |
323 | } | |
9c8da5eb DA |
324 | map->handle = dmah->vaddr; |
325 | map->offset = (unsigned long)dmah->busaddr; | |
326 | kfree(dmah); | |
2d0f9eaf | 327 | break; |
1da177e4 | 328 | default: |
9a298b2a | 329 | kfree(map); |
1da177e4 LT |
330 | return -EINVAL; |
331 | } | |
332 | ||
94e3370e | 333 | list = kzalloc(sizeof(*list), GFP_KERNEL); |
b5e89ed5 | 334 | if (!list) { |
85abb3f9 | 335 | if (map->type == _DRM_REGISTERS) |
004a7727 | 336 | iounmap(map->handle); |
9a298b2a | 337 | kfree(map); |
1da177e4 LT |
338 | return -EINVAL; |
339 | } | |
1da177e4 LT |
340 | list->map = map; |
341 | ||
30e2fb18 | 342 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 343 | list_add(&list->head, &dev->maplist); |
8d153f71 | 344 | |
d1f2b55a | 345 | /* Assign a 32-bit handle */ |
30e2fb18 | 346 | /* We do it here so that dev->struct_mutex protects the increment */ |
8d153f71 TH |
347 | user_token = (map->type == _DRM_SHM) ? (unsigned long)map->handle : |
348 | map->offset; | |
f1a2a9b6 DM |
349 | ret = drm_map_handle(dev, &list->hash, user_token, 0, |
350 | (map->type == _DRM_SHM)); | |
8d153f71 | 351 | if (ret) { |
85abb3f9 | 352 | if (map->type == _DRM_REGISTERS) |
004a7727 | 353 | iounmap(map->handle); |
9a298b2a EA |
354 | kfree(map); |
355 | kfree(list); | |
8d153f71 TH |
356 | mutex_unlock(&dev->struct_mutex); |
357 | return ret; | |
358 | } | |
359 | ||
1545085a | 360 | list->user_token = list->hash.key << PAGE_SHIFT; |
30e2fb18 | 361 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 362 | |
2ff2e8a3 BS |
363 | if (!(map->flags & _DRM_DRIVER)) |
364 | list->master = dev->primary->master; | |
89625eb1 | 365 | *maplist = list; |
7ab98401 | 366 | return 0; |
54ba2f76 | 367 | } |
89625eb1 | 368 | |
41c2e75e | 369 | int drm_addmap(struct drm_device * dev, resource_size_t offset, |
c60ce623 | 370 | unsigned int size, enum drm_map_type type, |
f77d390c | 371 | enum drm_map_flags flags, struct drm_local_map ** map_ptr) |
89625eb1 | 372 | { |
55910517 | 373 | struct drm_map_list *list; |
89625eb1 DA |
374 | int rc; |
375 | ||
376 | rc = drm_addmap_core(dev, offset, size, type, flags, &list); | |
377 | if (!rc) | |
378 | *map_ptr = list->map; | |
379 | return rc; | |
380 | } | |
b5e89ed5 | 381 | |
7ab98401 DA |
382 | EXPORT_SYMBOL(drm_addmap); |
383 | ||
f77d390c BH |
384 | /** |
385 | * Ioctl to specify a range of memory that is available for mapping by a | |
386 | * non-root process. | |
387 | * | |
388 | * \param inode device inode. | |
389 | * \param file_priv DRM file private. | |
390 | * \param cmd command. | |
391 | * \param arg pointer to a drm_map structure. | |
392 | * \return zero on success or a negative value on error. | |
393 | * | |
394 | */ | |
c153f45f EA |
395 | int drm_addmap_ioctl(struct drm_device *dev, void *data, |
396 | struct drm_file *file_priv) | |
7ab98401 | 397 | { |
c153f45f | 398 | struct drm_map *map = data; |
55910517 | 399 | struct drm_map_list *maplist; |
7ab98401 DA |
400 | int err; |
401 | ||
7c1c2871 | 402 | if (!(capable(CAP_SYS_ADMIN) || map->type == _DRM_AGP || map->type == _DRM_SHM)) |
d985c108 DA |
403 | return -EPERM; |
404 | ||
c153f45f EA |
405 | err = drm_addmap_core(dev, map->offset, map->size, map->type, |
406 | map->flags, &maplist); | |
7ab98401 | 407 | |
b5e89ed5 | 408 | if (err) |
7ab98401 | 409 | return err; |
d1f2b55a | 410 | |
67e1a014 | 411 | /* avoid a warning on 64-bit, this casting isn't very nice, but the API is set so too late */ |
c153f45f | 412 | map->handle = (void *)(unsigned long)maplist->user_token; |
1da177e4 | 413 | return 0; |
88f399cd | 414 | } |
1da177e4 | 415 | |
1da177e4 LT |
416 | /** |
417 | * Remove a map private from list and deallocate resources if the mapping | |
418 | * isn't in use. | |
419 | * | |
1da177e4 LT |
420 | * Searches the map on drm_device::maplist, removes it from the list, see if |
421 | * its being used, and free any associate resource (such as MTRR's) if it's not | |
422 | * being on use. | |
423 | * | |
7ab98401 | 424 | * \sa drm_addmap |
1da177e4 | 425 | */ |
f77d390c | 426 | int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map) |
1da177e4 | 427 | { |
55910517 | 428 | struct drm_map_list *r_list = NULL, *list_t; |
836cf046 | 429 | drm_dma_handle_t dmah; |
bd1b331f | 430 | int found = 0; |
7c1c2871 | 431 | struct drm_master *master; |
1da177e4 | 432 | |
836cf046 | 433 | /* Find the list entry for the map and remove it */ |
bd1b331f | 434 | list_for_each_entry_safe(r_list, list_t, &dev->maplist, head) { |
836cf046 | 435 | if (r_list->map == map) { |
7c1c2871 | 436 | master = r_list->master; |
bd1b331f | 437 | list_del(&r_list->head); |
1545085a TH |
438 | drm_ht_remove_key(&dev->map_hash, |
439 | r_list->user_token >> PAGE_SHIFT); | |
9a298b2a | 440 | kfree(r_list); |
bd1b331f | 441 | found = 1; |
836cf046 DA |
442 | break; |
443 | } | |
1da177e4 LT |
444 | } |
445 | ||
bd1b331f | 446 | if (!found) |
1da177e4 | 447 | return -EINVAL; |
1da177e4 | 448 | |
836cf046 DA |
449 | switch (map->type) { |
450 | case _DRM_REGISTERS: | |
004a7727 | 451 | iounmap(map->handle); |
836cf046 DA |
452 | /* FALLTHROUGH */ |
453 | case _DRM_FRAME_BUFFER: | |
454 | if (drm_core_has_MTRR(dev) && map->mtrr >= 0) { | |
455 | int retcode; | |
b5e89ed5 DA |
456 | retcode = mtrr_del(map->mtrr, map->offset, map->size); |
457 | DRM_DEBUG("mtrr_del=%d\n", retcode); | |
1da177e4 | 458 | } |
836cf046 DA |
459 | break; |
460 | case _DRM_SHM: | |
461 | vfree(map->handle); | |
7c1c2871 DA |
462 | if (master) { |
463 | if (dev->sigdata.lock == master->lock.hw_lock) | |
464 | dev->sigdata.lock = NULL; | |
465 | master->lock.hw_lock = NULL; /* SHM removed */ | |
466 | master->lock.file_priv = NULL; | |
171901d1 | 467 | wake_up_interruptible_all(&master->lock.lock_queue); |
7c1c2871 | 468 | } |
836cf046 DA |
469 | break; |
470 | case _DRM_AGP: | |
471 | case _DRM_SCATTER_GATHER: | |
472 | break; | |
473 | case _DRM_CONSISTENT: | |
474 | dmah.vaddr = map->handle; | |
475 | dmah.busaddr = map->offset; | |
476 | dmah.size = map->size; | |
477 | __drm_pci_free(dev, &dmah); | |
478 | break; | |
a2c0a97b JB |
479 | case _DRM_GEM: |
480 | DRM_ERROR("tried to rmmap GEM object\n"); | |
481 | break; | |
1da177e4 | 482 | } |
9a298b2a | 483 | kfree(map); |
836cf046 | 484 | |
1da177e4 LT |
485 | return 0; |
486 | } | |
4e74f36d | 487 | EXPORT_SYMBOL(drm_rmmap_locked); |
836cf046 | 488 | |
f77d390c | 489 | int drm_rmmap(struct drm_device *dev, struct drm_local_map *map) |
836cf046 DA |
490 | { |
491 | int ret; | |
492 | ||
30e2fb18 | 493 | mutex_lock(&dev->struct_mutex); |
836cf046 | 494 | ret = drm_rmmap_locked(dev, map); |
30e2fb18 | 495 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
496 | |
497 | return ret; | |
498 | } | |
ba8bbcf6 | 499 | EXPORT_SYMBOL(drm_rmmap); |
7ab98401 | 500 | |
836cf046 DA |
501 | /* The rmmap ioctl appears to be unnecessary. All mappings are torn down on |
502 | * the last close of the device, and this is necessary for cleanup when things | |
503 | * exit uncleanly. Therefore, having userland manually remove mappings seems | |
504 | * like a pointless exercise since they're going away anyway. | |
505 | * | |
506 | * One use case might be after addmap is allowed for normal users for SHM and | |
507 | * gets used by drivers that the server doesn't need to care about. This seems | |
508 | * unlikely. | |
f77d390c BH |
509 | * |
510 | * \param inode device inode. | |
511 | * \param file_priv DRM file private. | |
512 | * \param cmd command. | |
513 | * \param arg pointer to a struct drm_map structure. | |
514 | * \return zero on success or a negative value on error. | |
836cf046 | 515 | */ |
c153f45f EA |
516 | int drm_rmmap_ioctl(struct drm_device *dev, void *data, |
517 | struct drm_file *file_priv) | |
7ab98401 | 518 | { |
c153f45f | 519 | struct drm_map *request = data; |
f77d390c | 520 | struct drm_local_map *map = NULL; |
55910517 | 521 | struct drm_map_list *r_list; |
836cf046 | 522 | int ret; |
7ab98401 | 523 | |
30e2fb18 | 524 | mutex_lock(&dev->struct_mutex); |
bd1b331f | 525 | list_for_each_entry(r_list, &dev->maplist, head) { |
836cf046 | 526 | if (r_list->map && |
c153f45f | 527 | r_list->user_token == (unsigned long)request->handle && |
836cf046 DA |
528 | r_list->map->flags & _DRM_REMOVABLE) { |
529 | map = r_list->map; | |
530 | break; | |
531 | } | |
532 | } | |
533 | ||
534 | /* List has wrapped around to the head pointer, or its empty we didn't | |
535 | * find anything. | |
536 | */ | |
bd1b331f | 537 | if (list_empty(&dev->maplist) || !map) { |
30e2fb18 | 538 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
539 | return -EINVAL; |
540 | } | |
541 | ||
836cf046 DA |
542 | /* Register and framebuffer maps are permanent */ |
543 | if ((map->type == _DRM_REGISTERS) || (map->type == _DRM_FRAME_BUFFER)) { | |
30e2fb18 | 544 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
545 | return 0; |
546 | } | |
547 | ||
548 | ret = drm_rmmap_locked(dev, map); | |
549 | ||
30e2fb18 | 550 | mutex_unlock(&dev->struct_mutex); |
836cf046 DA |
551 | |
552 | return ret; | |
7ab98401 | 553 | } |
1da177e4 LT |
554 | |
555 | /** | |
556 | * Cleanup after an error on one of the addbufs() functions. | |
557 | * | |
836cf046 | 558 | * \param dev DRM device. |
1da177e4 LT |
559 | * \param entry buffer entry where the error occurred. |
560 | * | |
561 | * Frees any pages and buffers associated with the given entry. | |
562 | */ | |
cdd55a29 DA |
563 | static void drm_cleanup_buf_error(struct drm_device * dev, |
564 | struct drm_buf_entry * entry) | |
1da177e4 LT |
565 | { |
566 | int i; | |
567 | ||
568 | if (entry->seg_count) { | |
569 | for (i = 0; i < entry->seg_count; i++) { | |
570 | if (entry->seglist[i]) { | |
ddf19b97 | 571 | drm_pci_free(dev, entry->seglist[i]); |
1da177e4 LT |
572 | } |
573 | } | |
9a298b2a | 574 | kfree(entry->seglist); |
1da177e4 LT |
575 | |
576 | entry->seg_count = 0; | |
577 | } | |
578 | ||
b5e89ed5 DA |
579 | if (entry->buf_count) { |
580 | for (i = 0; i < entry->buf_count; i++) { | |
9a298b2a | 581 | kfree(entry->buflist[i].dev_private); |
1da177e4 | 582 | } |
9a298b2a | 583 | kfree(entry->buflist); |
1da177e4 LT |
584 | |
585 | entry->buf_count = 0; | |
586 | } | |
587 | } | |
588 | ||
589 | #if __OS_HAS_AGP | |
590 | /** | |
d59431bf | 591 | * Add AGP buffers for DMA transfers. |
1da177e4 | 592 | * |
84b1fd10 | 593 | * \param dev struct drm_device to which the buffers are to be added. |
c60ce623 | 594 | * \param request pointer to a struct drm_buf_desc describing the request. |
1da177e4 | 595 | * \return zero on success or a negative number on failure. |
b5e89ed5 | 596 | * |
1da177e4 LT |
597 | * After some sanity checks creates a drm_buf structure for each buffer and |
598 | * reallocates the buffer list of the same size order to accommodate the new | |
599 | * buffers. | |
600 | */ | |
84b1fd10 | 601 | int drm_addbufs_agp(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 602 | { |
cdd55a29 DA |
603 | struct drm_device_dma *dma = dev->dma; |
604 | struct drm_buf_entry *entry; | |
55910517 | 605 | struct drm_agp_mem *agp_entry; |
056219e2 | 606 | struct drm_buf *buf; |
1da177e4 LT |
607 | unsigned long offset; |
608 | unsigned long agp_offset; | |
609 | int count; | |
610 | int order; | |
611 | int size; | |
612 | int alignment; | |
613 | int page_order; | |
614 | int total; | |
615 | int byte_count; | |
54ba2f76 | 616 | int i, valid; |
056219e2 | 617 | struct drm_buf **temp_buflist; |
1da177e4 | 618 | |
b5e89ed5 DA |
619 | if (!dma) |
620 | return -EINVAL; | |
1da177e4 | 621 | |
d59431bf DA |
622 | count = request->count; |
623 | order = drm_order(request->size); | |
1da177e4 LT |
624 | size = 1 << order; |
625 | ||
b5e89ed5 DA |
626 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
627 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
628 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
629 | total = PAGE_SIZE << page_order; | |
630 | ||
631 | byte_count = 0; | |
d59431bf | 632 | agp_offset = dev->agp->base + request->agp_start; |
1da177e4 | 633 | |
b5e89ed5 DA |
634 | DRM_DEBUG("count: %d\n", count); |
635 | DRM_DEBUG("order: %d\n", order); | |
636 | DRM_DEBUG("size: %d\n", size); | |
d985c108 | 637 | DRM_DEBUG("agp_offset: %lx\n", agp_offset); |
b5e89ed5 DA |
638 | DRM_DEBUG("alignment: %d\n", alignment); |
639 | DRM_DEBUG("page_order: %d\n", page_order); | |
640 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 641 | |
b5e89ed5 DA |
642 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
643 | return -EINVAL; | |
644 | if (dev->queue_count) | |
645 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 646 | |
54ba2f76 DA |
647 | /* Make sure buffers are located in AGP memory that we own */ |
648 | valid = 0; | |
bd1b331f | 649 | list_for_each_entry(agp_entry, &dev->agp->memory, head) { |
54ba2f76 DA |
650 | if ((agp_offset >= agp_entry->bound) && |
651 | (agp_offset + total * count <= agp_entry->bound + agp_entry->pages * PAGE_SIZE)) { | |
652 | valid = 1; | |
653 | break; | |
654 | } | |
655 | } | |
bd1b331f | 656 | if (!list_empty(&dev->agp->memory) && !valid) { |
54ba2f76 DA |
657 | DRM_DEBUG("zone invalid\n"); |
658 | return -EINVAL; | |
659 | } | |
b5e89ed5 DA |
660 | spin_lock(&dev->count_lock); |
661 | if (dev->buf_use) { | |
662 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
663 | return -EBUSY; |
664 | } | |
b5e89ed5 DA |
665 | atomic_inc(&dev->buf_alloc); |
666 | spin_unlock(&dev->count_lock); | |
1da177e4 | 667 | |
30e2fb18 | 668 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 669 | entry = &dma->bufs[order]; |
b5e89ed5 | 670 | if (entry->buf_count) { |
30e2fb18 | 671 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
672 | atomic_dec(&dev->buf_alloc); |
673 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
674 | } |
675 | ||
676 | if (count < 0 || count > 4096) { | |
30e2fb18 | 677 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 678 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
679 | return -EINVAL; |
680 | } | |
681 | ||
94e3370e | 682 | entry->buflist = kzalloc(count * sizeof(*entry->buflist), GFP_KERNEL); |
b5e89ed5 | 683 | if (!entry->buflist) { |
30e2fb18 | 684 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 685 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
686 | return -ENOMEM; |
687 | } | |
1da177e4 LT |
688 | |
689 | entry->buf_size = size; | |
690 | entry->page_order = page_order; | |
691 | ||
692 | offset = 0; | |
693 | ||
b5e89ed5 DA |
694 | while (entry->buf_count < count) { |
695 | buf = &entry->buflist[entry->buf_count]; | |
696 | buf->idx = dma->buf_count + entry->buf_count; | |
697 | buf->total = alignment; | |
698 | buf->order = order; | |
699 | buf->used = 0; | |
1da177e4 | 700 | |
b5e89ed5 | 701 | buf->offset = (dma->byte_count + offset); |
1da177e4 LT |
702 | buf->bus_address = agp_offset + offset; |
703 | buf->address = (void *)(agp_offset + offset); | |
b5e89ed5 | 704 | buf->next = NULL; |
1da177e4 LT |
705 | buf->waiting = 0; |
706 | buf->pending = 0; | |
b5e89ed5 | 707 | init_waitqueue_head(&buf->dma_wait); |
6c340eac | 708 | buf->file_priv = NULL; |
1da177e4 LT |
709 | |
710 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
94e3370e | 711 | buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL); |
b5e89ed5 | 712 | if (!buf->dev_private) { |
1da177e4 LT |
713 | /* Set count correctly so we free the proper amount. */ |
714 | entry->buf_count = count; | |
b5e89ed5 | 715 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 716 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 717 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
718 | return -ENOMEM; |
719 | } | |
1da177e4 | 720 | |
b5e89ed5 | 721 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
722 | |
723 | offset += alignment; | |
724 | entry->buf_count++; | |
725 | byte_count += PAGE_SIZE << page_order; | |
726 | } | |
727 | ||
b5e89ed5 | 728 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 729 | |
9a298b2a EA |
730 | temp_buflist = krealloc(dma->buflist, |
731 | (dma->buf_count + entry->buf_count) * | |
732 | sizeof(*dma->buflist), GFP_KERNEL); | |
b5e89ed5 | 733 | if (!temp_buflist) { |
1da177e4 | 734 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 735 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 736 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 737 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
738 | return -ENOMEM; |
739 | } | |
740 | dma->buflist = temp_buflist; | |
741 | ||
b5e89ed5 | 742 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
743 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
744 | } | |
745 | ||
746 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
747 | dma->seg_count += entry->seg_count; |
748 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
749 | dma->byte_count += byte_count; |
750 | ||
b5e89ed5 DA |
751 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
752 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 753 | |
30e2fb18 | 754 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 755 | |
d59431bf DA |
756 | request->count = entry->buf_count; |
757 | request->size = size; | |
1da177e4 LT |
758 | |
759 | dma->flags = _DRM_DMA_USE_AGP; | |
760 | ||
b5e89ed5 | 761 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
762 | return 0; |
763 | } | |
d84f76d3 | 764 | EXPORT_SYMBOL(drm_addbufs_agp); |
b5e89ed5 | 765 | #endif /* __OS_HAS_AGP */ |
1da177e4 | 766 | |
84b1fd10 | 767 | int drm_addbufs_pci(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 768 | { |
cdd55a29 | 769 | struct drm_device_dma *dma = dev->dma; |
1da177e4 LT |
770 | int count; |
771 | int order; | |
772 | int size; | |
773 | int total; | |
774 | int page_order; | |
cdd55a29 | 775 | struct drm_buf_entry *entry; |
ddf19b97 | 776 | drm_dma_handle_t *dmah; |
056219e2 | 777 | struct drm_buf *buf; |
1da177e4 LT |
778 | int alignment; |
779 | unsigned long offset; | |
780 | int i; | |
781 | int byte_count; | |
782 | int page_count; | |
783 | unsigned long *temp_pagelist; | |
056219e2 | 784 | struct drm_buf **temp_buflist; |
1da177e4 | 785 | |
b5e89ed5 DA |
786 | if (!drm_core_check_feature(dev, DRIVER_PCI_DMA)) |
787 | return -EINVAL; | |
d985c108 | 788 | |
b5e89ed5 DA |
789 | if (!dma) |
790 | return -EINVAL; | |
1da177e4 | 791 | |
d985c108 DA |
792 | if (!capable(CAP_SYS_ADMIN)) |
793 | return -EPERM; | |
794 | ||
d59431bf DA |
795 | count = request->count; |
796 | order = drm_order(request->size); | |
1da177e4 LT |
797 | size = 1 << order; |
798 | ||
b5e89ed5 DA |
799 | DRM_DEBUG("count=%d, size=%d (%d), order=%d, queue_count=%d\n", |
800 | request->count, request->size, size, order, dev->queue_count); | |
1da177e4 | 801 | |
b5e89ed5 DA |
802 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
803 | return -EINVAL; | |
804 | if (dev->queue_count) | |
805 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 806 | |
d59431bf | 807 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b5e89ed5 | 808 | ? PAGE_ALIGN(size) : size; |
1da177e4 LT |
809 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
810 | total = PAGE_SIZE << page_order; | |
811 | ||
b5e89ed5 DA |
812 | spin_lock(&dev->count_lock); |
813 | if (dev->buf_use) { | |
814 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
815 | return -EBUSY; |
816 | } | |
b5e89ed5 DA |
817 | atomic_inc(&dev->buf_alloc); |
818 | spin_unlock(&dev->count_lock); | |
1da177e4 | 819 | |
30e2fb18 | 820 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 821 | entry = &dma->bufs[order]; |
b5e89ed5 | 822 | if (entry->buf_count) { |
30e2fb18 | 823 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 824 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
825 | return -ENOMEM; /* May only call once for each order */ |
826 | } | |
827 | ||
828 | if (count < 0 || count > 4096) { | |
30e2fb18 | 829 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 830 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
831 | return -EINVAL; |
832 | } | |
833 | ||
94e3370e | 834 | entry->buflist = kzalloc(count * sizeof(*entry->buflist), GFP_KERNEL); |
b5e89ed5 | 835 | if (!entry->buflist) { |
30e2fb18 | 836 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 837 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
838 | return -ENOMEM; |
839 | } | |
b5e89ed5 | 840 | |
94e3370e | 841 | entry->seglist = kzalloc(count * sizeof(*entry->seglist), GFP_KERNEL); |
b5e89ed5 | 842 | if (!entry->seglist) { |
9a298b2a | 843 | kfree(entry->buflist); |
30e2fb18 | 844 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 845 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
846 | return -ENOMEM; |
847 | } | |
1da177e4 LT |
848 | |
849 | /* Keep the original pagelist until we know all the allocations | |
850 | * have succeeded | |
851 | */ | |
9a298b2a EA |
852 | temp_pagelist = kmalloc((dma->page_count + (count << page_order)) * |
853 | sizeof(*dma->pagelist), GFP_KERNEL); | |
1da177e4 | 854 | if (!temp_pagelist) { |
9a298b2a EA |
855 | kfree(entry->buflist); |
856 | kfree(entry->seglist); | |
30e2fb18 | 857 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 858 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
859 | return -ENOMEM; |
860 | } | |
861 | memcpy(temp_pagelist, | |
b5e89ed5 DA |
862 | dma->pagelist, dma->page_count * sizeof(*dma->pagelist)); |
863 | DRM_DEBUG("pagelist: %d entries\n", | |
864 | dma->page_count + (count << page_order)); | |
1da177e4 | 865 | |
b5e89ed5 | 866 | entry->buf_size = size; |
1da177e4 LT |
867 | entry->page_order = page_order; |
868 | byte_count = 0; | |
869 | page_count = 0; | |
870 | ||
b5e89ed5 | 871 | while (entry->buf_count < count) { |
bc5f4523 | 872 | |
e6be8d9d | 873 | dmah = drm_pci_alloc(dev, PAGE_SIZE << page_order, 0x1000); |
bc5f4523 | 874 | |
ddf19b97 | 875 | if (!dmah) { |
1da177e4 LT |
876 | /* Set count correctly so we free the proper amount. */ |
877 | entry->buf_count = count; | |
878 | entry->seg_count = count; | |
879 | drm_cleanup_buf_error(dev, entry); | |
9a298b2a | 880 | kfree(temp_pagelist); |
30e2fb18 | 881 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 882 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
883 | return -ENOMEM; |
884 | } | |
ddf19b97 | 885 | entry->seglist[entry->seg_count++] = dmah; |
b5e89ed5 DA |
886 | for (i = 0; i < (1 << page_order); i++) { |
887 | DRM_DEBUG("page %d @ 0x%08lx\n", | |
888 | dma->page_count + page_count, | |
ddf19b97 | 889 | (unsigned long)dmah->vaddr + PAGE_SIZE * i); |
1da177e4 | 890 | temp_pagelist[dma->page_count + page_count++] |
ddf19b97 | 891 | = (unsigned long)dmah->vaddr + PAGE_SIZE * i; |
1da177e4 | 892 | } |
b5e89ed5 DA |
893 | for (offset = 0; |
894 | offset + size <= total && entry->buf_count < count; | |
895 | offset += alignment, ++entry->buf_count) { | |
896 | buf = &entry->buflist[entry->buf_count]; | |
897 | buf->idx = dma->buf_count + entry->buf_count; | |
898 | buf->total = alignment; | |
899 | buf->order = order; | |
900 | buf->used = 0; | |
901 | buf->offset = (dma->byte_count + byte_count + offset); | |
ddf19b97 DA |
902 | buf->address = (void *)(dmah->vaddr + offset); |
903 | buf->bus_address = dmah->busaddr + offset; | |
b5e89ed5 | 904 | buf->next = NULL; |
1da177e4 LT |
905 | buf->waiting = 0; |
906 | buf->pending = 0; | |
b5e89ed5 | 907 | init_waitqueue_head(&buf->dma_wait); |
6c340eac | 908 | buf->file_priv = NULL; |
1da177e4 LT |
909 | |
910 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
94e3370e DB |
911 | buf->dev_private = kzalloc(buf->dev_priv_size, |
912 | GFP_KERNEL); | |
b5e89ed5 | 913 | if (!buf->dev_private) { |
1da177e4 LT |
914 | /* Set count correctly so we free the proper amount. */ |
915 | entry->buf_count = count; | |
916 | entry->seg_count = count; | |
b5e89ed5 | 917 | drm_cleanup_buf_error(dev, entry); |
9a298b2a | 918 | kfree(temp_pagelist); |
30e2fb18 | 919 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 920 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
921 | return -ENOMEM; |
922 | } | |
1da177e4 | 923 | |
b5e89ed5 DA |
924 | DRM_DEBUG("buffer %d @ %p\n", |
925 | entry->buf_count, buf->address); | |
1da177e4 LT |
926 | } |
927 | byte_count += PAGE_SIZE << page_order; | |
928 | } | |
929 | ||
9a298b2a EA |
930 | temp_buflist = krealloc(dma->buflist, |
931 | (dma->buf_count + entry->buf_count) * | |
932 | sizeof(*dma->buflist), GFP_KERNEL); | |
1da177e4 LT |
933 | if (!temp_buflist) { |
934 | /* Free the entry because it isn't valid */ | |
b5e89ed5 | 935 | drm_cleanup_buf_error(dev, entry); |
9a298b2a | 936 | kfree(temp_pagelist); |
30e2fb18 | 937 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 938 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
939 | return -ENOMEM; |
940 | } | |
941 | dma->buflist = temp_buflist; | |
942 | ||
b5e89ed5 | 943 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
944 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
945 | } | |
946 | ||
88393161 | 947 | /* No allocations failed, so now we can replace the original pagelist |
1da177e4 LT |
948 | * with the new one. |
949 | */ | |
950 | if (dma->page_count) { | |
9a298b2a | 951 | kfree(dma->pagelist); |
1da177e4 LT |
952 | } |
953 | dma->pagelist = temp_pagelist; | |
954 | ||
955 | dma->buf_count += entry->buf_count; | |
956 | dma->seg_count += entry->seg_count; | |
957 | dma->page_count += entry->seg_count << page_order; | |
958 | dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order); | |
959 | ||
30e2fb18 | 960 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 961 | |
d59431bf DA |
962 | request->count = entry->buf_count; |
963 | request->size = size; | |
1da177e4 | 964 | |
3417f33e GS |
965 | if (request->flags & _DRM_PCI_BUFFER_RO) |
966 | dma->flags = _DRM_DMA_USE_PCI_RO; | |
967 | ||
b5e89ed5 | 968 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
969 | return 0; |
970 | ||
971 | } | |
d84f76d3 | 972 | EXPORT_SYMBOL(drm_addbufs_pci); |
1da177e4 | 973 | |
84b1fd10 | 974 | static int drm_addbufs_sg(struct drm_device * dev, struct drm_buf_desc * request) |
1da177e4 | 975 | { |
cdd55a29 DA |
976 | struct drm_device_dma *dma = dev->dma; |
977 | struct drm_buf_entry *entry; | |
056219e2 | 978 | struct drm_buf *buf; |
1da177e4 LT |
979 | unsigned long offset; |
980 | unsigned long agp_offset; | |
981 | int count; | |
982 | int order; | |
983 | int size; | |
984 | int alignment; | |
985 | int page_order; | |
986 | int total; | |
987 | int byte_count; | |
988 | int i; | |
056219e2 | 989 | struct drm_buf **temp_buflist; |
1da177e4 | 990 | |
b5e89ed5 DA |
991 | if (!drm_core_check_feature(dev, DRIVER_SG)) |
992 | return -EINVAL; | |
993 | ||
994 | if (!dma) | |
995 | return -EINVAL; | |
1da177e4 | 996 | |
d985c108 DA |
997 | if (!capable(CAP_SYS_ADMIN)) |
998 | return -EPERM; | |
999 | ||
d59431bf DA |
1000 | count = request->count; |
1001 | order = drm_order(request->size); | |
1da177e4 LT |
1002 | size = 1 << order; |
1003 | ||
b5e89ed5 DA |
1004 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
1005 | ? PAGE_ALIGN(size) : size; | |
1da177e4 LT |
1006 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; |
1007 | total = PAGE_SIZE << page_order; | |
1008 | ||
1009 | byte_count = 0; | |
d59431bf | 1010 | agp_offset = request->agp_start; |
1da177e4 | 1011 | |
b5e89ed5 DA |
1012 | DRM_DEBUG("count: %d\n", count); |
1013 | DRM_DEBUG("order: %d\n", order); | |
1014 | DRM_DEBUG("size: %d\n", size); | |
1015 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
1016 | DRM_DEBUG("alignment: %d\n", alignment); | |
1017 | DRM_DEBUG("page_order: %d\n", page_order); | |
1018 | DRM_DEBUG("total: %d\n", total); | |
1da177e4 | 1019 | |
b5e89ed5 DA |
1020 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
1021 | return -EINVAL; | |
1022 | if (dev->queue_count) | |
1023 | return -EBUSY; /* Not while in use */ | |
1da177e4 | 1024 | |
b5e89ed5 DA |
1025 | spin_lock(&dev->count_lock); |
1026 | if (dev->buf_use) { | |
1027 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1028 | return -EBUSY; |
1029 | } | |
b5e89ed5 DA |
1030 | atomic_inc(&dev->buf_alloc); |
1031 | spin_unlock(&dev->count_lock); | |
1da177e4 | 1032 | |
30e2fb18 | 1033 | mutex_lock(&dev->struct_mutex); |
1da177e4 | 1034 | entry = &dma->bufs[order]; |
b5e89ed5 | 1035 | if (entry->buf_count) { |
30e2fb18 | 1036 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 DA |
1037 | atomic_dec(&dev->buf_alloc); |
1038 | return -ENOMEM; /* May only call once for each order */ | |
1da177e4 LT |
1039 | } |
1040 | ||
1041 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1042 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1043 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1044 | return -EINVAL; |
1045 | } | |
1046 | ||
94e3370e | 1047 | entry->buflist = kzalloc(count * sizeof(*entry->buflist), |
9a298b2a | 1048 | GFP_KERNEL); |
b5e89ed5 | 1049 | if (!entry->buflist) { |
30e2fb18 | 1050 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1051 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1052 | return -ENOMEM; |
1053 | } | |
1da177e4 LT |
1054 | |
1055 | entry->buf_size = size; | |
1056 | entry->page_order = page_order; | |
1057 | ||
1058 | offset = 0; | |
1059 | ||
b5e89ed5 DA |
1060 | while (entry->buf_count < count) { |
1061 | buf = &entry->buflist[entry->buf_count]; | |
1062 | buf->idx = dma->buf_count + entry->buf_count; | |
1063 | buf->total = alignment; | |
1064 | buf->order = order; | |
1065 | buf->used = 0; | |
1da177e4 | 1066 | |
b5e89ed5 | 1067 | buf->offset = (dma->byte_count + offset); |
1da177e4 | 1068 | buf->bus_address = agp_offset + offset; |
b5e89ed5 | 1069 | buf->address = (void *)(agp_offset + offset |
d1f2b55a | 1070 | + (unsigned long)dev->sg->virtual); |
b5e89ed5 | 1071 | buf->next = NULL; |
1da177e4 LT |
1072 | buf->waiting = 0; |
1073 | buf->pending = 0; | |
b5e89ed5 | 1074 | init_waitqueue_head(&buf->dma_wait); |
6c340eac | 1075 | buf->file_priv = NULL; |
1da177e4 LT |
1076 | |
1077 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
94e3370e | 1078 | buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL); |
b5e89ed5 | 1079 | if (!buf->dev_private) { |
1da177e4 LT |
1080 | /* Set count correctly so we free the proper amount. */ |
1081 | entry->buf_count = count; | |
b5e89ed5 | 1082 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1083 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1084 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1085 | return -ENOMEM; |
1086 | } | |
1087 | ||
b5e89ed5 | 1088 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); |
1da177e4 LT |
1089 | |
1090 | offset += alignment; | |
1091 | entry->buf_count++; | |
1092 | byte_count += PAGE_SIZE << page_order; | |
1093 | } | |
1094 | ||
b5e89ed5 | 1095 | DRM_DEBUG("byte_count: %d\n", byte_count); |
1da177e4 | 1096 | |
9a298b2a EA |
1097 | temp_buflist = krealloc(dma->buflist, |
1098 | (dma->buf_count + entry->buf_count) * | |
1099 | sizeof(*dma->buflist), GFP_KERNEL); | |
b5e89ed5 | 1100 | if (!temp_buflist) { |
1da177e4 | 1101 | /* Free the entry because it isn't valid */ |
b5e89ed5 | 1102 | drm_cleanup_buf_error(dev, entry); |
30e2fb18 | 1103 | mutex_unlock(&dev->struct_mutex); |
b5e89ed5 | 1104 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1105 | return -ENOMEM; |
1106 | } | |
1107 | dma->buflist = temp_buflist; | |
1108 | ||
b5e89ed5 | 1109 | for (i = 0; i < entry->buf_count; i++) { |
1da177e4 LT |
1110 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; |
1111 | } | |
1112 | ||
1113 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1114 | dma->seg_count += entry->seg_count; |
1115 | dma->page_count += byte_count >> PAGE_SHIFT; | |
1da177e4 LT |
1116 | dma->byte_count += byte_count; |
1117 | ||
b5e89ed5 DA |
1118 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); |
1119 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1da177e4 | 1120 | |
30e2fb18 | 1121 | mutex_unlock(&dev->struct_mutex); |
1da177e4 | 1122 | |
d59431bf DA |
1123 | request->count = entry->buf_count; |
1124 | request->size = size; | |
1da177e4 LT |
1125 | |
1126 | dma->flags = _DRM_DMA_USE_SG; | |
1127 | ||
b5e89ed5 | 1128 | atomic_dec(&dev->buf_alloc); |
1da177e4 LT |
1129 | return 0; |
1130 | } | |
1131 | ||
84b1fd10 | 1132 | static int drm_addbufs_fb(struct drm_device * dev, struct drm_buf_desc * request) |
b84397d6 | 1133 | { |
cdd55a29 DA |
1134 | struct drm_device_dma *dma = dev->dma; |
1135 | struct drm_buf_entry *entry; | |
056219e2 | 1136 | struct drm_buf *buf; |
b84397d6 DA |
1137 | unsigned long offset; |
1138 | unsigned long agp_offset; | |
1139 | int count; | |
1140 | int order; | |
1141 | int size; | |
1142 | int alignment; | |
1143 | int page_order; | |
1144 | int total; | |
1145 | int byte_count; | |
1146 | int i; | |
056219e2 | 1147 | struct drm_buf **temp_buflist; |
b84397d6 DA |
1148 | |
1149 | if (!drm_core_check_feature(dev, DRIVER_FB_DMA)) | |
1150 | return -EINVAL; | |
b5e89ed5 | 1151 | |
b84397d6 DA |
1152 | if (!dma) |
1153 | return -EINVAL; | |
1154 | ||
d985c108 DA |
1155 | if (!capable(CAP_SYS_ADMIN)) |
1156 | return -EPERM; | |
1157 | ||
d59431bf DA |
1158 | count = request->count; |
1159 | order = drm_order(request->size); | |
b84397d6 DA |
1160 | size = 1 << order; |
1161 | ||
d59431bf | 1162 | alignment = (request->flags & _DRM_PAGE_ALIGN) |
b84397d6 DA |
1163 | ? PAGE_ALIGN(size) : size; |
1164 | page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0; | |
1165 | total = PAGE_SIZE << page_order; | |
1166 | ||
1167 | byte_count = 0; | |
d59431bf | 1168 | agp_offset = request->agp_start; |
b84397d6 DA |
1169 | |
1170 | DRM_DEBUG("count: %d\n", count); | |
1171 | DRM_DEBUG("order: %d\n", order); | |
1172 | DRM_DEBUG("size: %d\n", size); | |
1173 | DRM_DEBUG("agp_offset: %lu\n", agp_offset); | |
1174 | DRM_DEBUG("alignment: %d\n", alignment); | |
1175 | DRM_DEBUG("page_order: %d\n", page_order); | |
1176 | DRM_DEBUG("total: %d\n", total); | |
1177 | ||
1178 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) | |
1179 | return -EINVAL; | |
1180 | if (dev->queue_count) | |
1181 | return -EBUSY; /* Not while in use */ | |
1182 | ||
1183 | spin_lock(&dev->count_lock); | |
1184 | if (dev->buf_use) { | |
1185 | spin_unlock(&dev->count_lock); | |
1186 | return -EBUSY; | |
1187 | } | |
1188 | atomic_inc(&dev->buf_alloc); | |
1189 | spin_unlock(&dev->count_lock); | |
1190 | ||
30e2fb18 | 1191 | mutex_lock(&dev->struct_mutex); |
b84397d6 DA |
1192 | entry = &dma->bufs[order]; |
1193 | if (entry->buf_count) { | |
30e2fb18 | 1194 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1195 | atomic_dec(&dev->buf_alloc); |
1196 | return -ENOMEM; /* May only call once for each order */ | |
1197 | } | |
1198 | ||
1199 | if (count < 0 || count > 4096) { | |
30e2fb18 | 1200 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1201 | atomic_dec(&dev->buf_alloc); |
1202 | return -EINVAL; | |
1203 | } | |
1204 | ||
94e3370e | 1205 | entry->buflist = kzalloc(count * sizeof(*entry->buflist), |
9a298b2a | 1206 | GFP_KERNEL); |
b84397d6 | 1207 | if (!entry->buflist) { |
30e2fb18 | 1208 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1209 | atomic_dec(&dev->buf_alloc); |
1210 | return -ENOMEM; | |
1211 | } | |
b84397d6 DA |
1212 | |
1213 | entry->buf_size = size; | |
1214 | entry->page_order = page_order; | |
1215 | ||
1216 | offset = 0; | |
1217 | ||
1218 | while (entry->buf_count < count) { | |
1219 | buf = &entry->buflist[entry->buf_count]; | |
1220 | buf->idx = dma->buf_count + entry->buf_count; | |
1221 | buf->total = alignment; | |
1222 | buf->order = order; | |
1223 | buf->used = 0; | |
1224 | ||
1225 | buf->offset = (dma->byte_count + offset); | |
1226 | buf->bus_address = agp_offset + offset; | |
1227 | buf->address = (void *)(agp_offset + offset); | |
1228 | buf->next = NULL; | |
1229 | buf->waiting = 0; | |
1230 | buf->pending = 0; | |
1231 | init_waitqueue_head(&buf->dma_wait); | |
6c340eac | 1232 | buf->file_priv = NULL; |
b84397d6 DA |
1233 | |
1234 | buf->dev_priv_size = dev->driver->dev_priv_size; | |
94e3370e | 1235 | buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL); |
b84397d6 DA |
1236 | if (!buf->dev_private) { |
1237 | /* Set count correctly so we free the proper amount. */ | |
1238 | entry->buf_count = count; | |
1239 | drm_cleanup_buf_error(dev, entry); | |
30e2fb18 | 1240 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1241 | atomic_dec(&dev->buf_alloc); |
1242 | return -ENOMEM; | |
1243 | } | |
b84397d6 DA |
1244 | |
1245 | DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address); | |
1246 | ||
1247 | offset += alignment; | |
1248 | entry->buf_count++; | |
1249 | byte_count += PAGE_SIZE << page_order; | |
1250 | } | |
1251 | ||
1252 | DRM_DEBUG("byte_count: %d\n", byte_count); | |
1253 | ||
9a298b2a EA |
1254 | temp_buflist = krealloc(dma->buflist, |
1255 | (dma->buf_count + entry->buf_count) * | |
1256 | sizeof(*dma->buflist), GFP_KERNEL); | |
b84397d6 DA |
1257 | if (!temp_buflist) { |
1258 | /* Free the entry because it isn't valid */ | |
1259 | drm_cleanup_buf_error(dev, entry); | |
30e2fb18 | 1260 | mutex_unlock(&dev->struct_mutex); |
b84397d6 DA |
1261 | atomic_dec(&dev->buf_alloc); |
1262 | return -ENOMEM; | |
1263 | } | |
1264 | dma->buflist = temp_buflist; | |
1265 | ||
1266 | for (i = 0; i < entry->buf_count; i++) { | |
1267 | dma->buflist[i + dma->buf_count] = &entry->buflist[i]; | |
1268 | } | |
1269 | ||
1270 | dma->buf_count += entry->buf_count; | |
d985c108 DA |
1271 | dma->seg_count += entry->seg_count; |
1272 | dma->page_count += byte_count >> PAGE_SHIFT; | |
b84397d6 DA |
1273 | dma->byte_count += byte_count; |
1274 | ||
1275 | DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count); | |
1276 | DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count); | |
1277 | ||
30e2fb18 | 1278 | mutex_unlock(&dev->struct_mutex); |
b84397d6 | 1279 | |
d59431bf DA |
1280 | request->count = entry->buf_count; |
1281 | request->size = size; | |
b84397d6 DA |
1282 | |
1283 | dma->flags = _DRM_DMA_USE_FB; | |
1284 | ||
1285 | atomic_dec(&dev->buf_alloc); | |
1286 | return 0; | |
1287 | } | |
d985c108 | 1288 | |
b84397d6 | 1289 | |
1da177e4 LT |
1290 | /** |
1291 | * Add buffers for DMA transfers (ioctl). | |
1292 | * | |
1293 | * \param inode device inode. | |
6c340eac | 1294 | * \param file_priv DRM file private. |
1da177e4 | 1295 | * \param cmd command. |
c60ce623 | 1296 | * \param arg pointer to a struct drm_buf_desc request. |
1da177e4 LT |
1297 | * \return zero on success or a negative number on failure. |
1298 | * | |
1299 | * According with the memory type specified in drm_buf_desc::flags and the | |
1300 | * build options, it dispatches the call either to addbufs_agp(), | |
1301 | * addbufs_sg() or addbufs_pci() for AGP, scatter-gather or consistent | |
1302 | * PCI memory respectively. | |
1303 | */ | |
c153f45f EA |
1304 | int drm_addbufs(struct drm_device *dev, void *data, |
1305 | struct drm_file *file_priv) | |
1da177e4 | 1306 | { |
c153f45f | 1307 | struct drm_buf_desc *request = data; |
d59431bf | 1308 | int ret; |
b5e89ed5 | 1309 | |
1da177e4 LT |
1310 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) |
1311 | return -EINVAL; | |
1312 | ||
1da177e4 | 1313 | #if __OS_HAS_AGP |
c153f45f EA |
1314 | if (request->flags & _DRM_AGP_BUFFER) |
1315 | ret = drm_addbufs_agp(dev, request); | |
1da177e4 LT |
1316 | else |
1317 | #endif | |
c153f45f EA |
1318 | if (request->flags & _DRM_SG_BUFFER) |
1319 | ret = drm_addbufs_sg(dev, request); | |
1320 | else if (request->flags & _DRM_FB_BUFFER) | |
1321 | ret = drm_addbufs_fb(dev, request); | |
1da177e4 | 1322 | else |
c153f45f | 1323 | ret = drm_addbufs_pci(dev, request); |
d59431bf | 1324 | |
d59431bf | 1325 | return ret; |
1da177e4 LT |
1326 | } |
1327 | ||
1da177e4 LT |
1328 | /** |
1329 | * Get information about the buffer mappings. | |
1330 | * | |
1331 | * This was originally mean for debugging purposes, or by a sophisticated | |
1332 | * client library to determine how best to use the available buffers (e.g., | |
1333 | * large buffers can be used for image transfer). | |
1334 | * | |
1335 | * \param inode device inode. | |
6c340eac | 1336 | * \param file_priv DRM file private. |
1da177e4 LT |
1337 | * \param cmd command. |
1338 | * \param arg pointer to a drm_buf_info structure. | |
1339 | * \return zero on success or a negative number on failure. | |
1340 | * | |
1341 | * Increments drm_device::buf_use while holding the drm_device::count_lock | |
1342 | * lock, preventing of allocating more buffers after this call. Information | |
1343 | * about each requested buffer is then copied into user space. | |
1344 | */ | |
c153f45f EA |
1345 | int drm_infobufs(struct drm_device *dev, void *data, |
1346 | struct drm_file *file_priv) | |
1da177e4 | 1347 | { |
cdd55a29 | 1348 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1349 | struct drm_buf_info *request = data; |
1da177e4 LT |
1350 | int i; |
1351 | int count; | |
1352 | ||
1353 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1354 | return -EINVAL; | |
1355 | ||
b5e89ed5 DA |
1356 | if (!dma) |
1357 | return -EINVAL; | |
1da177e4 | 1358 | |
b5e89ed5 DA |
1359 | spin_lock(&dev->count_lock); |
1360 | if (atomic_read(&dev->buf_alloc)) { | |
1361 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1362 | return -EBUSY; |
1363 | } | |
1364 | ++dev->buf_use; /* Can't allocate more after this call */ | |
b5e89ed5 | 1365 | spin_unlock(&dev->count_lock); |
1da177e4 | 1366 | |
b5e89ed5 DA |
1367 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1368 | if (dma->bufs[i].buf_count) | |
1369 | ++count; | |
1da177e4 LT |
1370 | } |
1371 | ||
b5e89ed5 | 1372 | DRM_DEBUG("count = %d\n", count); |
1da177e4 | 1373 | |
c153f45f | 1374 | if (request->count >= count) { |
b5e89ed5 DA |
1375 | for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) { |
1376 | if (dma->bufs[i].buf_count) { | |
c60ce623 | 1377 | struct drm_buf_desc __user *to = |
c153f45f | 1378 | &request->list[count]; |
cdd55a29 DA |
1379 | struct drm_buf_entry *from = &dma->bufs[i]; |
1380 | struct drm_freelist *list = &dma->bufs[i].freelist; | |
b5e89ed5 DA |
1381 | if (copy_to_user(&to->count, |
1382 | &from->buf_count, | |
1383 | sizeof(from->buf_count)) || | |
1384 | copy_to_user(&to->size, | |
1385 | &from->buf_size, | |
1386 | sizeof(from->buf_size)) || | |
1387 | copy_to_user(&to->low_mark, | |
1388 | &list->low_mark, | |
1389 | sizeof(list->low_mark)) || | |
1390 | copy_to_user(&to->high_mark, | |
1391 | &list->high_mark, | |
1392 | sizeof(list->high_mark))) | |
1da177e4 LT |
1393 | return -EFAULT; |
1394 | ||
b5e89ed5 DA |
1395 | DRM_DEBUG("%d %d %d %d %d\n", |
1396 | i, | |
1397 | dma->bufs[i].buf_count, | |
1398 | dma->bufs[i].buf_size, | |
1399 | dma->bufs[i].freelist.low_mark, | |
1400 | dma->bufs[i].freelist.high_mark); | |
1da177e4 LT |
1401 | ++count; |
1402 | } | |
1403 | } | |
1404 | } | |
c153f45f | 1405 | request->count = count; |
1da177e4 LT |
1406 | |
1407 | return 0; | |
1408 | } | |
1409 | ||
1410 | /** | |
1411 | * Specifies a low and high water mark for buffer allocation | |
1412 | * | |
1413 | * \param inode device inode. | |
6c340eac | 1414 | * \param file_priv DRM file private. |
1da177e4 LT |
1415 | * \param cmd command. |
1416 | * \param arg a pointer to a drm_buf_desc structure. | |
1417 | * \return zero on success or a negative number on failure. | |
1418 | * | |
1419 | * Verifies that the size order is bounded between the admissible orders and | |
1420 | * updates the respective drm_device_dma::bufs entry low and high water mark. | |
1421 | * | |
1422 | * \note This ioctl is deprecated and mostly never used. | |
1423 | */ | |
c153f45f EA |
1424 | int drm_markbufs(struct drm_device *dev, void *data, |
1425 | struct drm_file *file_priv) | |
1da177e4 | 1426 | { |
cdd55a29 | 1427 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1428 | struct drm_buf_desc *request = data; |
1da177e4 | 1429 | int order; |
cdd55a29 | 1430 | struct drm_buf_entry *entry; |
1da177e4 LT |
1431 | |
1432 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1433 | return -EINVAL; | |
1434 | ||
b5e89ed5 DA |
1435 | if (!dma) |
1436 | return -EINVAL; | |
1da177e4 | 1437 | |
b5e89ed5 | 1438 | DRM_DEBUG("%d, %d, %d\n", |
c153f45f EA |
1439 | request->size, request->low_mark, request->high_mark); |
1440 | order = drm_order(request->size); | |
b5e89ed5 DA |
1441 | if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) |
1442 | return -EINVAL; | |
1da177e4 LT |
1443 | entry = &dma->bufs[order]; |
1444 | ||
c153f45f | 1445 | if (request->low_mark < 0 || request->low_mark > entry->buf_count) |
1da177e4 | 1446 | return -EINVAL; |
c153f45f | 1447 | if (request->high_mark < 0 || request->high_mark > entry->buf_count) |
1da177e4 LT |
1448 | return -EINVAL; |
1449 | ||
c153f45f EA |
1450 | entry->freelist.low_mark = request->low_mark; |
1451 | entry->freelist.high_mark = request->high_mark; | |
1da177e4 LT |
1452 | |
1453 | return 0; | |
1454 | } | |
1455 | ||
1456 | /** | |
b5e89ed5 | 1457 | * Unreserve the buffers in list, previously reserved using drmDMA. |
1da177e4 LT |
1458 | * |
1459 | * \param inode device inode. | |
6c340eac | 1460 | * \param file_priv DRM file private. |
1da177e4 LT |
1461 | * \param cmd command. |
1462 | * \param arg pointer to a drm_buf_free structure. | |
1463 | * \return zero on success or a negative number on failure. | |
b5e89ed5 | 1464 | * |
1da177e4 LT |
1465 | * Calls free_buffer() for each used buffer. |
1466 | * This function is primarily used for debugging. | |
1467 | */ | |
c153f45f EA |
1468 | int drm_freebufs(struct drm_device *dev, void *data, |
1469 | struct drm_file *file_priv) | |
1da177e4 | 1470 | { |
cdd55a29 | 1471 | struct drm_device_dma *dma = dev->dma; |
c153f45f | 1472 | struct drm_buf_free *request = data; |
1da177e4 LT |
1473 | int i; |
1474 | int idx; | |
056219e2 | 1475 | struct drm_buf *buf; |
1da177e4 LT |
1476 | |
1477 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1478 | return -EINVAL; | |
1479 | ||
b5e89ed5 DA |
1480 | if (!dma) |
1481 | return -EINVAL; | |
1da177e4 | 1482 | |
c153f45f EA |
1483 | DRM_DEBUG("%d\n", request->count); |
1484 | for (i = 0; i < request->count; i++) { | |
1485 | if (copy_from_user(&idx, &request->list[i], sizeof(idx))) | |
1da177e4 | 1486 | return -EFAULT; |
b5e89ed5 DA |
1487 | if (idx < 0 || idx >= dma->buf_count) { |
1488 | DRM_ERROR("Index %d (of %d max)\n", | |
1489 | idx, dma->buf_count - 1); | |
1da177e4 LT |
1490 | return -EINVAL; |
1491 | } | |
1492 | buf = dma->buflist[idx]; | |
6c340eac | 1493 | if (buf->file_priv != file_priv) { |
b5e89ed5 | 1494 | DRM_ERROR("Process %d freeing buffer not owned\n", |
ba25f9dc | 1495 | task_pid_nr(current)); |
1da177e4 LT |
1496 | return -EINVAL; |
1497 | } | |
b5e89ed5 | 1498 | drm_free_buffer(dev, buf); |
1da177e4 LT |
1499 | } |
1500 | ||
1501 | return 0; | |
1502 | } | |
1503 | ||
1504 | /** | |
1505 | * Maps all of the DMA buffers into client-virtual space (ioctl). | |
1506 | * | |
1507 | * \param inode device inode. | |
6c340eac | 1508 | * \param file_priv DRM file private. |
1da177e4 LT |
1509 | * \param cmd command. |
1510 | * \param arg pointer to a drm_buf_map structure. | |
1511 | * \return zero on success or a negative number on failure. | |
1512 | * | |
6be5ceb0 LT |
1513 | * Maps the AGP, SG or PCI buffer region with vm_mmap(), and copies information |
1514 | * about each buffer into user space. For PCI buffers, it calls vm_mmap() with | |
3417f33e GS |
1515 | * offset equal to 0, which drm_mmap() interpretes as PCI buffers and calls |
1516 | * drm_mmap_dma(). | |
1da177e4 | 1517 | */ |
c153f45f EA |
1518 | int drm_mapbufs(struct drm_device *dev, void *data, |
1519 | struct drm_file *file_priv) | |
1da177e4 | 1520 | { |
cdd55a29 | 1521 | struct drm_device_dma *dma = dev->dma; |
1da177e4 LT |
1522 | int retcode = 0; |
1523 | const int zero = 0; | |
1524 | unsigned long virtual; | |
1525 | unsigned long address; | |
c153f45f | 1526 | struct drm_buf_map *request = data; |
1da177e4 LT |
1527 | int i; |
1528 | ||
1529 | if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA)) | |
1530 | return -EINVAL; | |
1531 | ||
b5e89ed5 DA |
1532 | if (!dma) |
1533 | return -EINVAL; | |
1da177e4 | 1534 | |
b5e89ed5 DA |
1535 | spin_lock(&dev->count_lock); |
1536 | if (atomic_read(&dev->buf_alloc)) { | |
1537 | spin_unlock(&dev->count_lock); | |
1da177e4 LT |
1538 | return -EBUSY; |
1539 | } | |
1540 | dev->buf_use++; /* Can't allocate more after this call */ | |
b5e89ed5 | 1541 | spin_unlock(&dev->count_lock); |
1da177e4 | 1542 | |
c153f45f | 1543 | if (request->count >= dma->buf_count) { |
b84397d6 | 1544 | if ((drm_core_has_AGP(dev) && (dma->flags & _DRM_DMA_USE_AGP)) |
b5e89ed5 | 1545 | || (drm_core_check_feature(dev, DRIVER_SG) |
b84397d6 DA |
1546 | && (dma->flags & _DRM_DMA_USE_SG)) |
1547 | || (drm_core_check_feature(dev, DRIVER_FB_DMA) | |
1548 | && (dma->flags & _DRM_DMA_USE_FB))) { | |
f77d390c | 1549 | struct drm_local_map *map = dev->agp_buffer_map; |
d1f2b55a | 1550 | unsigned long token = dev->agp_buffer_token; |
1da177e4 | 1551 | |
b5e89ed5 | 1552 | if (!map) { |
1da177e4 LT |
1553 | retcode = -EINVAL; |
1554 | goto done; | |
1555 | } | |
6be5ceb0 | 1556 | virtual = vm_mmap(file_priv->filp, 0, map->size, |
b5e89ed5 | 1557 | PROT_READ | PROT_WRITE, |
c153f45f EA |
1558 | MAP_SHARED, |
1559 | token); | |
1da177e4 | 1560 | } else { |
6be5ceb0 | 1561 | virtual = vm_mmap(file_priv->filp, 0, dma->byte_count, |
b5e89ed5 DA |
1562 | PROT_READ | PROT_WRITE, |
1563 | MAP_SHARED, 0); | |
1da177e4 | 1564 | } |
b5e89ed5 | 1565 | if (virtual > -1024UL) { |
1da177e4 LT |
1566 | /* Real error */ |
1567 | retcode = (signed long)virtual; | |
1568 | goto done; | |
1569 | } | |
c153f45f | 1570 | request->virtual = (void __user *)virtual; |
1da177e4 | 1571 | |
b5e89ed5 | 1572 | for (i = 0; i < dma->buf_count; i++) { |
c153f45f | 1573 | if (copy_to_user(&request->list[i].idx, |
b5e89ed5 | 1574 | &dma->buflist[i]->idx, |
c153f45f | 1575 | sizeof(request->list[0].idx))) { |
1da177e4 LT |
1576 | retcode = -EFAULT; |
1577 | goto done; | |
1578 | } | |
c153f45f | 1579 | if (copy_to_user(&request->list[i].total, |
b5e89ed5 | 1580 | &dma->buflist[i]->total, |
c153f45f | 1581 | sizeof(request->list[0].total))) { |
1da177e4 LT |
1582 | retcode = -EFAULT; |
1583 | goto done; | |
1584 | } | |
c153f45f | 1585 | if (copy_to_user(&request->list[i].used, |
b5e89ed5 | 1586 | &zero, sizeof(zero))) { |
1da177e4 LT |
1587 | retcode = -EFAULT; |
1588 | goto done; | |
1589 | } | |
b5e89ed5 | 1590 | address = virtual + dma->buflist[i]->offset; /* *** */ |
c153f45f | 1591 | if (copy_to_user(&request->list[i].address, |
b5e89ed5 | 1592 | &address, sizeof(address))) { |
1da177e4 LT |
1593 | retcode = -EFAULT; |
1594 | goto done; | |
1595 | } | |
1596 | } | |
1597 | } | |
b5e89ed5 | 1598 | done: |
c153f45f EA |
1599 | request->count = dma->buf_count; |
1600 | DRM_DEBUG("%d buffers, retcode = %d\n", request->count, retcode); | |
1da177e4 LT |
1601 | |
1602 | return retcode; | |
1603 | } | |
1604 | ||
836cf046 DA |
1605 | /** |
1606 | * Compute size order. Returns the exponent of the smaller power of two which | |
1607 | * is greater or equal to given number. | |
b5e89ed5 | 1608 | * |
836cf046 DA |
1609 | * \param size size. |
1610 | * \return order. | |
1611 | * | |
1612 | * \todo Can be made faster. | |
1613 | */ | |
b5e89ed5 | 1614 | int drm_order(unsigned long size) |
836cf046 DA |
1615 | { |
1616 | int order; | |
1617 | unsigned long tmp; | |
1618 | ||
b5e89ed5 | 1619 | for (order = 0, tmp = size >> 1; tmp; tmp >>= 1, order++) ; |
836cf046 DA |
1620 | |
1621 | if (size & (size - 1)) | |
1622 | ++order; | |
1623 | ||
1624 | return order; | |
1625 | } | |
1626 | EXPORT_SYMBOL(drm_order); |